Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (1,664)	$ 2,919
Other comprehensive income before reclassifications	2,749	(1,873)
Amounts reclassified from accumulated other comprehensive income	485	524
Net increase in other comprehensive income	3,234	(1,349)
Ending balance	1,570	1,570
Foreign currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(878)	1,381
Other comprehensive income before reclassifications	2,409	150
Amounts reclassified from accumulated other comprehensive income	0	0
Net increase in other comprehensive income	2,409	150
Ending balance	1,531	1,531
Change in unrealized gains on available for sale securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(786)	1,538
Other comprehensive income before reclassifications	340	(2,023)
Amounts reclassified from accumulated other comprehensive income	485	524
Net increase in other comprehensive income	825	(1,499)
Ending balance	$ 39	$ 39